URL Encoder Online

What is URL encoding?

URL encoding, also called percent encoding, converts characters that are not safe for URLs into a format that browsers and web servers can safely transmit. Unsafe characters are replaced with a percent sign (%) followed by two hexadecimal digits representing the character's UTF-8 byte value.

What is a URL Encoder?

A URL Encoder converts plain text into a URL-safe format by replacing reserved or unsupported characters with percent-encoded values. This ensures URLs work correctly across browsers, servers, and APIs.

What is a URL Decoder?

A URL Decoder converts percent-encoded text back into its original readable form. It restores spaces, special characters, Unicode text, and other encoded values.

What is the difference between encodeURIComponent() and encodeURI()?

encodeURIComponent() encodes nearly every reserved character, making it ideal for individual query parameter values. encodeURI() preserves URL structure characters such as :, /, ?, #, &, and =, making it suitable for encoding an entire URL.

When should I use encodeURIComponent()?

Use encodeURIComponent() whenever you're encoding a query parameter, search term, form field, filename, or any other value that will become part of a URL.

When should I use encodeURI()?

Use encodeURI() when encoding a complete URL that already contains its protocol, domain, path, and query string, and you want to preserve its structural characters.

Why are spaces encoded as %20?

According to URL encoding standards, a space is represented as %20. Some web forms and older systems use the + character instead, but %20 is the standard encoding for URLs.

Does this tool support Unicode and emoji?

Yes. The encoder uses UTF-8 encoding, allowing it to correctly encode and decode emoji, accented characters, Asian languages, Arabic, Cyrillic, and other Unicode text.

Can I decode an encoded URL?

Yes. Paste any valid percent-encoded URL into the decoder to restore it to its original readable form.

Does URL encoding change the meaning of the data?

No. URL encoding only changes how characters are represented during transmission. Decoding restores the exact original content.

Is URL encoding the same as encryption?

No. URL encoding is not a security feature. It simply converts characters into a URL-safe format and can be easily reversed. It should not be used to protect sensitive information.

What characters need to be URL encoded?

Characters such as spaces, %, &, =, ?, #, ", <, >, {, }, |, \, ^, [, ], and other reserved or unsafe characters should be encoded when required by the context.

Can I encode JSON for use in URLs?

Yes. JSON data is commonly URL encoded before being sent as a query parameter or included in redirect URLs and API requests.

Is my data uploaded to a server?

No. All encoding and decoding happen locally in your browser using JavaScript's built-in encodeURIComponent(), decodeURIComponent(), encodeURI(), and decodeURI() functions. Your data never leaves your device.

Can I use this tool offline?

Yes. Once the webpage has loaded, all encoding and decoding operations run locally in your browser and do not require an internet connection.

Is there a maximum input length?

There is no fixed limit imposed by the tool itself. The maximum input size depends on your browser's available memory and your device's hardware capabilities.

Which programming languages use URL encoding?

URL encoding is widely used in JavaScript, TypeScript, Node.js, Python, PHP, Java, C#, Go, Ruby, Swift, Kotlin, Rust, and many other programming languages for web development, APIs, HTTP requests, and URL generation.

Why should I URL encode data?

URL encoding ensures that special characters, spaces, Unicode text, and reserved symbols are transmitted correctly between browsers, web servers, APIs, and applications. It helps prevent malformed URLs, improves compatibility, and ensures query parameters are interpreted exactly as intended.